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Efficient and Stable Inverted Planar Perovskite Solar Cells Using a Triphenylamine Hole‐Transporting Material
Author(s) -
Chen Rui,
Bu Tongle,
Li Jing,
Li Wei,
Zhou Peng,
Liu Xueping,
Ku Zhiliang,
Zhong Jie,
Peng Yong,
Huang Fuzhi,
Cheng YiBing,
Fu Zhengyi
Publication year - 2018
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201800476
Subject(s) - pedot:pss , triphenylamine , perovskite (structure) , energy conversion efficiency , materials science , optoelectronics , polymer solar cell , chemical engineering , nanotechnology , chemistry , organic chemistry , layer (electronics) , engineering
Inverted perovskite solar cells (PSCs) with a p‐i‐n structure have attracted great attention. Normally, inorganic p‐type metal oxides or polymers are used as the hole‐transport material (HTM), a vital component in the inverted PSCs. However, this type of HTM often requires high processing temperatures and/or high costs. On the other hand, a commonly used organic HTM, poly(3,4‐ethylenedioxythiophene polystyrene sulfonate (PEDOT:PSS), is sensitive to humidity and thus affects the stability of the PSCs. Herein, we employ a small molecule, 4,4′,4′′‐tris( N ‐3‐methylphenyl‐ N ‐phenylamino) triphenylamine ( m ‐MTDATA) to replace PEDOT:PSS as a new HTM for inverted PSCs. Compared to a PEDOT:PSS‐based device, m ‐MTDATA‐based PSCs exhibit enhanced performance. The highest power conversion efficiency (PCE) was notably improved from 13.44 % (PEDOT:PSS) to 18.12 % ( m ‐MTDATA), suggesting that m ‐MTDATA could be an efficient HTM to achieve high performance inverted PSCs. Furthermore, the m ‐MTDATA‐based device demonstrated improved stability (retaining 90 % PCE) under ambient conditions over 1000 h compared with the PEDOT:PSS‐based devices (retaining 40 % PCE).